A basic form where you can upload one image. Use https://github.com/1up-lab/OneupUploaderBundle to handle the upload of the actual file.

Maybe integrate Disqus or something else to make this happen.

A cool feature would be having taxonomy and something realy cool would be, to extract the taxonomy from the images if available. I know at least lightroom who does this.

Implement a simple view of the Image.

It should be possible to upload images in any size, even if your server does not support it. So we need a chunked and batchable file upload.

Implement a basic layout with semantic ui.

Implement basic entities as described in the spec.

Do it right, this time!

Use BeSimpleI18nRoutingBundle to provide localized paths.

Implement collections of images

Use something like this https://github.com/FriendsOfSymfony/FOSUserBundle to handle user management.s